How Countries Frame Their Climate Commitments: Explaining Cross-National Variation in NDC Policy Implementation Specificity

Abstract

Despite near-universal participation in the Paris Agreement, current national climate commitments remain insufficient to achieve the 1.5–2°C warming target. This study examines what national characteristics explain variation in how countries frame their climate commitments within Nationally Determined Contributions (NDCs). Using automated text analysis of 93 NDCs submitted to the UNFCCC between 2020 and 2023, the study assesses seven linguistic dimensions of policy implementation specificity. An ordinary least squares (OLS) regression with country-specific political, social, and economic predictors reveals a consistent development divide: wealthier countries produce mitigation-oriented, unconditional NDCs, while less developed countries emphasize adaptation and frame commitments as contingent on external support. Fossil fuel energy share is a strong negative predictor of institutional specificity, suggesting that energy-sector political costs suppress detailed institutional commitments. Democratic governance shows a marginal negative association with institutional specificity, consistent with the argument that established democracies need not explicitly signal governance capacity that is already credible to international audiences. Female political representation is positively associated with stronger commitment language. Together, these findings suggest that closing the ambition gap requires addressing the resource constraints that push developing nations toward conditional commitments and understanding how energy politics and institutional context shape how countries signal their willingness to act.